Fractionation analysis of some heavy metals in sediments of the north-western part of the Red Sea, Egypt

2011 ◽  
Vol 27 (5) ◽  
pp. 427-443 ◽  
Author(s):  
Hoda H.H. Ahdy ◽  
Doaa H. Youssef
Keyword(s):  
Heavy Metals ◽  
Red Sea ◽  
The North ◽  
Fractionation Analysis ◽  
North Western

scholarly journals Assessment of ecological state of the Posyet Bay (the Sea of Japan) by heavy metals content in brown algae

2017 ◽  
Vol 6 (2) ◽  
pp. 91-95
Author(s):  
Nadezhda Konstantinovna Khristoforova ◽  
Anna Dmitrievna Kobzar
Keyword(s):  
Heavy Metals ◽  
Sea Of Japan ◽  
Coastal Waters ◽  
Atmospheric Transport ◽  
The Sea Of Japan ◽  
High Concentration ◽  
The North ◽  
Recreational Pressure ◽  
North Western ◽  
Sargassum Miyabei

The paper contains the study of heavy metals in three species - Sargassum miyabei , Sargassum pallidum , Cystoseira crassipes in the coastal waters of the Posyet Bay. The analysis of the spatial distribution of trace elements revealed the highest contents of zinc, copper and nickel in the Troitsa Bight, due to recreational pressure and a high concentration of nickel and cadmium in Sivuchya Bight that was caused by transboundary atmospheric transport. All of detected concentrations exceed natural background values for the North-Western part of the Sea of Japan. The authors show that there has been a distinct change in the environmental situation in the the Posyet Bay since 1998: the concentration of lead has sharply decreased, the content of zinc, copper and cadmium has decreased, it could be connected with influence reduction in the free economic zone, located on the Chinese side on the Tumannaya River.

scholarly journals Health risk analysis as per radiation and chemical factors in a zone influenced by a nuclear legacy object in the north-western part of Russia

2021 ◽  
pp. 38-47
Author(s):  
S.M. Kiselev ◽  
◽  
N.K. Shandala ◽  
T.N. Lashchenova ◽  
Yu.N. Zozul ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Health Risk ◽  
Spent Nuclear Fuel ◽  
Chemical Contamination ◽  
Residential Areas ◽  
Background Levels ◽  
The North ◽  
Murmansk Region ◽  
Chemical Factors ◽  
North Western

Rehabilitation programs for nuclear legacy objects in north-western regions in Russia involve decommissioning; a former coast technical support base belonging to the RF Navy and located on the Gremikha peninsula in Murmansk region is now being removed from service. At present spent nuclear fuel is being extracted from ship reactors with liquid-metal coolant and nuclear wastes that have been accumulated during active operations are being treated. The current activities at the site result in complex influence on the environment determined by both radiation and non-radiation contaminants. The present work focuses on examining a hygienic situation existing in residential areas located close to this nuclear legacy object. In general, radiation situation in residential areas is determined by technogenic contaminants, basically 137Cs and 90Sr radionuclides. Our research has revealed that at the moment their contents in the environmental objects correspond to background levels that are typical for the examined region. Chemical contamination detected in residential areas is characterized with elevated heavy metals contents (Cd, As, Pb, V, Zn, Cu etc.) in soils in urban settlements that are higher than background levels. We detected lead and zinc concentrations that were higher than MPC. Total soil contamination with heavy metals (Zc) is still «permissible» in most residential areas. Carcinogenic health risk for people living in the examined residential areas does not exceed 10-6 as per radiation and chemical factors. Research results allow assessing the current hygienic situation as normal and concluding that decommissioning of SZC «SevRAO» objects (Gremikha section) does not exert negative impacts on the environment and health of people living in residential areas located nearby. The obtained data give grounds for controlling activities when environmental monitoring is accomplished during works aimed at recovering contaminated areas where nuclear legacy objects are located.

A statistical study of 238U and 234U/238U distributions in coral samples from the Egyptian shoreline of the north-western Red Sea and in fossil mollusk shells from the Atlantic coast of High Atlas in Morocco: Implications for 230Th/234U dating

2002 ◽  
Vol 90 (6) ◽  
Author(s):  
A. Choukri ◽  
J.-L. Reyss ◽  
O.K. Hakam ◽  
J. C. Plaziat
Keyword(s):  
Red Sea ◽  
Statistical Study ◽  
Atlantic Coast ◽  
Radiochemical Analysis ◽  
Statistical Distributions ◽  
The South ◽  
High Atlas ◽  
Mollusk Shells ◽  
The North ◽  
North Western

SummaryIn this work, radiochemical analysis results of 126 unrecrystallized coral samples from the Egyptian shoreline of northwestern Red Sea and 120 fossil mollusk shell samples from the Atlantic coast of Moroccan High Atlas at the North of Agadir City in Morocco are presented and discussed. The coral samples were collected in Egypt from the emerged coral reef terraces over 500 km from The Ras Gharib-Ras Shukeir depression (28°10') in the north to Wadi Lahami (north of Ras Banas, 24°10') in the south. The fossil mollusk shells were collected in Morocco from Agadir-Harbour in the south to Tamri village in the north extending over about 50 km. The statistical distributions of results (For corals,For mollusk shells, except for Holocene sea level,

Porites fontanesii, a new species of hard coral (Scleractinia, Poritidae) from the southern Red Sea, the Gulf of Tadjoura, and the Gulf of Aden, and its phylogenetic relationships within the genus

Zootaxa ◽  
2012 ◽  
Vol 3447 (1) ◽  
pp. 56 ◽  
Author(s):  
FRANCESCA BENZONI ◽  
FABRIZIO STEFANI
Keyword(s):  
New Species ◽  
Red Sea ◽  
Scleractinian Coral ◽  
Coral Species ◽  
Distinct Species ◽  
Gulf Of Aden ◽  
Hard Coral ◽  
The North ◽  
North Western ◽  
A New Species

A new zooxanthellate reef-dwelling scleractinian coral species, Porites fontanesii sp. nov. (Scleractinia, Poritidae), is de-scribed. The examined material was collected from the Southern Red Sea, the Gulf of Tadjoura, and the Gulf of Aden.Porites fontanesii sp. nov. was most frequently observed along the Yemen south Red Sea and the north-western Gulf ofAden coasts. Although a complete molecular phylogeny of Porites is not available yet, the relationships between P. fon-tanesii sp. nov. and twenty other species of the genus were explored through analysis of the available rDNA sequences.Porites fontanesii sp. nov. was seen to be a distinct species basal to, and well divergent from, one of the two main clades so far identified in the genus rDNA phylogeny.

scholarly journals Correction to: Synchronized broadcast spawning by six invertebrates (Echinodermata and Mollusca) in the north-western Red Sea

2021 ◽  
Vol 168 (6) ◽  
Author(s):  
Alice E. Webb ◽  
Aschwin H. Engelen ◽  
Jessica Bouwmeester ◽  
Inge van Dijk ◽  
Esmee Geerken ◽  
...  
Keyword(s):  
Red Sea ◽  
Broadcast Spawning ◽  
The North ◽  
North Western

scholarly journals Health risk analysis as per radiation and chemical factors in a zone influenced by a nuclear legacy object in the north-western part of Russia

2021 ◽  
pp. 38-47
Author(s):  
S.M. Kiselev ◽  
◽  
N.K. Shandala ◽  
T.N. Lashchenova ◽  
Yu.N. Zozul ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Health Risk ◽  
Spent Nuclear Fuel ◽  
Chemical Contamination ◽  
Residential Areas ◽  
Background Levels ◽  
The North ◽  
Murmansk Region ◽  
Chemical Factors ◽  
North Western

Rehabilitation programs for nuclear legacy objects in north-western regions in Russia involve decommissioning; a former coast technical support base belonging to the RF Navy and located on the Gremikha peninsula in Murmansk region is now being removed from service. At present spent nuclear fuel is being extracted from ship reactors with liquid-metal coolant and nuclear wastes that have been accumulated during active operations are being treated. The current activities at the site result in complex influence on the environment determined by both radiation and non-radiation contaminants. The present work focuses on examining a hygienic situation existing in residential areas located close to this nuclear legacy object. In general, radiation situation in residential areas is determined by technogenic contaminants, basically 137Cs and 90Sr radionuclides. Our research has revealed that at the moment their contents in the environmental objects correspond to background levels that are typical for the examined region. Chemical contamination detected in residential areas is characterized with elevated heavy metals contents (Cd, As, Pb, V, Zn, Cu etc.) in soils in urban settlements that are higher than background levels. We detected lead and zinc concentrations that were higher than MPC. Total soil contamination with heavy metals (Zc) is still «permissible» in most residential areas. Carcinogenic health risk for people living in the examined residential areas does not exceed 10-6 as per radiation and chemical factors. Research results allow assessing the current hygienic situation as normal and concluding that decommissioning of SZC «SevRAO» objects (Gremikha section) does not exert negative impacts on the environment and health of people living in residential areas located nearby. The obtained data give grounds for controlling activities when environmental monitoring is accomplished during works aimed at recovering contaminated areas where nuclear legacy objects are located.

scholarly journals An updated checklist of tintinnids (Order: Choreotrichida)in the north western coast of the Red Sea at Hurghada

2021 ◽  
Vol 2 (2) ◽  
pp. 297-306
Author(s):  
Gehad Abdelrahman ◽  
Fedekar Madkour ◽  
Mohamed Hassan ◽  
Mohamed Abu El-Regal
Keyword(s):  
Red Sea ◽  
Western Coast ◽  
The North ◽  
North Western
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